Rack



FIG. 1 is an enlarged perspective view of a rack showing my new design, the rear being flat and unornamented;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof; and

FIG. 4 is a side view thereof; the other side view being a mirror image thereof. 

The ornamental design for a rack, as shown and described. 